On the cusp of valleytronics

Nanowerk  November 30, 2018
According to researchers in Singapore information can be transmitted by controlling an electron’s association with a valley — a manipulation that can be achieved using electric fields, magnetic fields and circularly polarised light. As the valley is a property of the whole material, the valley states are destroyed only if the material is significantly modified or ceases to exist. Therefore, encoding information onto valley states should be more enduring due to the unique coupling of electron spin to valley. They are engineering a number of new and useful 2D semiconductors for this technology by adjusting their composition to tune band gaps and thus control their conduction properties. They have put together a suite of tools for sizing up 2D materials for their valley contrast…read more. Open Source TECHNICAL ARTICLE

The band structure of two-dimensional materials such as tungsten disulfide has ‘valleys’ that provide a way to encode information using an electron. (© IOP Publishing Figure 1 from Nano Futures 2, 032001 (2018))

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